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undergraduate thesis
Kvantnomehanički opis i tumačenje nanomagneta
Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology, 2016. urn:nbn:hr:149:135262
Krišto, Anđela
University of Zagreb
Faculty of Chemical Engineering and Technology

Institutional repository: Repository of Faculty of Chemical Engineering and Technology University of Zagreb

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Krišto, A. (2016). Kvantnomehanički opis i tumačenje nanomagneta (Undergraduate thesis). Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology. Retrieved from https://urn.nsk.hr/urn:nbn:hr:149:135262

Krišto, Anđela. "Kvantnomehanički opis i tumačenje nanomagneta." Undergraduate thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, 2016. https://urn.nsk.hr/urn:nbn:hr:149:135262

Krišto, Anđela. "Kvantnomehanički opis i tumačenje nanomagneta." Undergraduate thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, 2016. https://urn.nsk.hr/urn:nbn:hr:149:135262

Krišto, A. (2016). 'Kvantnomehanički opis i tumačenje nanomagneta', Undergraduate thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, accessed 23 November 2024, https://urn.nsk.hr/urn:nbn:hr:149:135262

Krišto A. Kvantnomehanički opis i tumačenje nanomagneta [Undergraduate thesis]. Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology; 2016 [cited 2024 November 23] Available at: https://urn.nsk.hr/urn:nbn:hr:149:135262

A. Krišto, "Kvantnomehanički opis i tumačenje nanomagneta", Undergraduate thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, Zagreb, 2016. Available at: https://urn.nsk.hr/urn:nbn:hr:149:135262

Metadata
TitleKvantnomehanički opis i tumačenje nanomagneta
Title (english)Quantum mechanical description and interpretation of nanomagnets
AuthorAnđela Krišto
MentorVladimir Dananić (mentor)
Committee memberVladimir Dananić (predsjednik povjerenstva)
Committee memberAnte Jukić (član povjerenstva)
Committee memberZvonimir Glasnović (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Chemical Engineering and Technology
Zagreb
Defense date and country2016-07-11, Croatia
Scientific / art field,
discipline and subdiscipline		NATURAL SCIENCES
Physics
Condensed Matter Physics
Abstract
Zadatak ovog završnog rada je kvantno-mehanički opis dinamike spina u nanomagnetima, te tumačenje pojava koje se javljaju na nanometarskoj skali magnetskih čestica. Matematički opis dinamike spina sadržava tri glavne teoretske jednadžbe: Bloch jednadžba, Landau-Lifshitz jednadžba, te Landau-Lifshitz-Gilbert jednadžba dinamike spina. Na primjerima jednomolekulskog magneta Mn12-acetata, nanočestica CuFe2O4 i Cu0.5Fe2.5O4, te amorfne nanoslitine Hf57Fe43 objašnjene su pojave klasične i kvantne magnetske relaksacije, tuneliranja spina, magnetskih domena, te utjecaj kemijske strukture tih čestica na njihova fizikalna svojstva. Na temelju mjerenja magnetskog momenta tokom hlađenja u magnetskom polju i bez magnetskog polja, određene su krivulje histereze pojedinog sustava. Iz rezultata tih mjerenja, zaključuju se uzroci pojedinih oblika krivulje i očitavaju karakteristične vrijednosti za dani primjer.
Abstract (english)
The primary goal of this thesis is a quantum-mechanical description of spin-dynamics in nanomagnets, and the interpretation of phenomena relating general nano-scale events in magnetic particles. Mathematical description of spin mechanics is done through three main theoretical equations: The Bloch-equation, Landau-Lifshitz equation and Landau-Lifshitz-Gilbert equation. Examples of single-molecule magnets such as Mn12-acetate, nanoparticles CuFe2O4 i Cu0.5Fe2.5O4, and amorphous nano-alloys Hf57Fe43 are given, to explain classical and quantum magnetic relaxation phenomenon, spin thermal activation and quantum tunnelling, magnetic domains and the general influence of chemical structure on certain physical properties. Based on magnetic moment measurement results, hysteresis-loops for each system were acquired. Those results lead towards conclusion of causes behind curve-shape details, and enable notification of specific system characteristics.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:149:135262
Study programmeTitle: Chemical Engineering - Undergraduate study
Study programme type: university
Study level: undergraduate
Academic / professional title: sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka kemijskog inženjerstva (sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka kemijskog inženjerstva)
Type of resourceText
File originBorn digital
Access conditionsOpen access
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Created on2017-12-07 08:51:16